especially in a plummeting gas price environment, we need these incentives in order to keep building the infrastructure. >> solar, i think, is undergoing a sort of remarkable decline in the costs of production, but it doesn't have nearly the share that wind does, right? is that where solar is at right now? >> let me put this in perspective. if you talk about the tax to convert satellite into electricity. the first commercial use was in 1994. at the time it was literally astronomical in costs. not for the space race with the soviets where we needed satellites in space and needed power for the satellites. nasa turned to solar cells as a sourt of power for the satellites. at the time they cost literally hundreds of dollars per watt. nasa didn't care, right? >> it's nasa. >> over the last decades the cost of solar cells has come down and down and down. the efficiency, the conversion efficiency has continued to go up and up and up, right? now you've got solar cells that are produced for under a dollar a watt. just in the last few years they came down a factor of three thanks to the chines